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Physics · PYQ NEET UG 2026

हिन्दी

Which of the following measurements require 'index correction'?

  1. A
    Measurement of resistance of a wire using meter bridge
  2. B
    Measurement of gravitational acceleration using simple pendulum
  3. C
    Measurement of focal length of lenses using optical bench
  4. D
    Measurement of speed of sound using resonance tube
View Answer & Solution

Correct answer · Option C

Measurement of focal length of lenses using optical bench

Explanation

Index correction is applied in optical bench experiments when measuring the focal length of lenses due to the zero-error in the positions of the index marks on the optical needles or lenses.

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